Experimentally Calculated Study of the Effectiveness on the Process of Non-Catalytic Synthesis of Biodiesel in Reactors of Various Type

It was experimentally established that the dependence of the partial pressure of methanol on the molar fraction of methanol in oil shows a pronounced negative deviation from Raoul’s law, which significantly changes the idea of the influence of a large excess of methanol during non-catalytic synthesis of biodiesel. The efficiency of use of a molar excess of methanol is reduced as it grows, and with a more than 10-fold molar excess of the amount of reacted methanol, is practically constant. The comparison of biodiesel production processes in the range 220–235 °C showed that a slight change in the process temperature more effectively affects the biodiesel yield than an increase in the molar excess of methanol. A mathematical model of the process of transesterification of rapeseed oil in reactors of various types (batch and tubular reactors) is developed. A satisfactory correlation between the experimental and calculated data was observed. The calculation showed that the rate constants of the reverse reactions at 230 °C were not significant.

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Study on Biodiesel Production from Rapeseed Oil through the Orthogonal Method

Energy Sources Part A Recovery Utilization and Environmental Effects ◽

10.1080/15567036.2011.576417 ◽

2015 ◽

Vol 37 (4) ◽

pp. 422-427 ◽

Cited By ~ 1

Author(s):

Y. Zhang ◽

H. You

Keyword(s):

Rapeseed Oil ◽

Biodiesel Production ◽

Orthogonal Method

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Economic assessment of batch biodiesel production processes using homogeneous and heterogeneous alkali catalysts

Bioresource Technology ◽

10.1016/j.biortech.2009.02.010 ◽

2009 ◽

Vol 100 (13) ◽

pp. 3268-3276 ◽

Cited By ~ 109

Author(s):

Tsutomu Sakai ◽

Ayato Kawashima ◽

Tetsuya Koshikawa

Keyword(s):

Economic Assessment ◽

Biodiesel Production ◽

Production Processes ◽

Alkali Catalysts

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Energy balance for biodiesel production processes using microbial oil and scum

Bioresource Technology ◽

10.1016/j.biortech.2018.10.071 ◽

2019 ◽

Vol 272 ◽

pp. 379-388 ◽

Cited By ~ 8

Author(s):

Lalit R. Kumar ◽

Sravan Kumar Yellapu ◽

Xiaolei Zhang ◽

R.D. Tyagi

Keyword(s):

Energy Balance ◽

Biodiesel Production ◽

Microbial Oil ◽

Production Processes

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RAPE SEED OIL TETRAHYDROFURFURYLESTERS

Environment Technology Resources Proceedings of the International Scientific and Practical Conference ◽

10.17770/etr2009vol1.1105 ◽

2015 ◽

Vol 1 ◽

pp. 46

Author(s):

K. Malins ◽

V. Kampars ◽

R. Kampare ◽

T. Rusakova

Keyword(s):

Rapeseed Oil ◽

Fossil Fuels ◽

Raw Materials ◽

Methyl Esters ◽

Cetane Number ◽

Food Prices ◽

Raw Material ◽

Biodiesel Production ◽

Cold Filter Plugging Point ◽

Mineral Oils

The transesterification of vegetable oil using various kinds of alcohols is a simple and efficient renewable fuel synthesis technique. Products obtained by modifying natural triglycerides in transesterification reaction substitute fossil fuels and mineral oils. Currently the most significant is the biodiesel, a mixture of fatty acid methyl esters, which is obtained in a reaction with methanol, which in turn is obtained from fossil raw materials. In biodiesel production it would be more appropriate to use alcohols which can be obtained from renewable local raw materials. Ethanol rouses interest as a possible reagent, however, its production locally is based on the use of grain and therefore competes with food production so it would implicitly cause increase in food prices. Another raw material option is alcohols that can be obtained from furfurole. Furfurole is obtained in dehydration process from pentose sugars which can be extracted from crop straw, husk and other residues of agricultural production. From furfurole the tetrahydrofurfuryl alcohol (THFA), a raw material for biodiesel, can be produced. By transesterifying rapeseed oil with THFA it would be possible to obtain completely renewable biodiesel with properties very close to diesel [2-4]. With the purpose of developing the synthesis of such fuel, in this work a three-stage synthesis of rapeseed oil tetrahydrofurfurylesters (ROTHFE) in sulphuric acid presence has been performed, achieving product with purity over 98%. The most important qualitative factors of ROTHFE have been determined - cold filter plugging point, cetane number, water content, Iodine value, phosphorus content, density, viscosity and oxidative stability.

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Rapeseed: how to value varieties with higher nitrogen use efficiency in France

OCL ◽

10.1051/ocl/2019021 ◽

2019 ◽

Vol 26 ◽

pp. 26 ◽

Cited By ~ 1

Author(s):

Edwige Charbonnier ◽

Aline Fugeray-Scarbel ◽

Stéphane Lemarié

Keyword(s):

Nitrogen Use Efficiency ◽

Value Chain ◽

Rapeseed Oil ◽

Biodiesel Production ◽

Greenhouse Gas Balance ◽

Nitrogen Use ◽

Use Efficiency ◽

Different Levels ◽

Gas Balance ◽

Detailed Presentation

This article focuses on the interest in improving the nitrogen use efficiency of rapeseed varieties in France. We show that this trait is of interest at different levels of the value chain and for different markets. Nitrogen use efficiency improves farmers’ margins by reducing fertilizing costs or increasing yields. Nitrogen use efficiency also improves the GHG (greenhouse gas) balance of rapeseed used for biodiesel production and the image of edible rapeseed oil for consumers within the framework of specific labels. Finally, nitrogen use efficiency can also be seen as a trait that improves the protein content of rapeseed oilcake and, therefore, increases its value compared to competing sources of protein. After a detailed presentation of these different valuations, we provide current or possible measures that have been or could be implemented to encourage different actors in the sector to develop and diffuse this trait.

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